RT Journal Article
T1 Centralized and distributed spectrum channel assignment in cognitive wireless networks: 												A Harmony Search approach
A1 Del Ser, Javier
A1 Matinmikko, Marja
A1 Gil-López, Sergio
A1 Mustonen, Miia
AB This paper gravitates on the spectrum channel allocation problem where each compounding node of a cognitive radio network is assigned a frequency channel for transmission over a given outgoing link, based on optimizing an overall network performance metric dependant on the level of interference among nearby nodes. In this context, genetically inspired algorithms have been extensively used so far for solving this optimization problem in a computationally efficient manner. This work extends previous preliminary research carried out by the authors on the application of the heuristic Harmony Search (HS) algorithm to this scenario by presenting further results and derivations on both HS-based centralized and distributed spectrum allocation techniques. Among such advances, a novel adaptive island-like distributed allocation procedure is presented, which dramatically decreases the transmission rate required for exchanging control traffic among nodes at a quantifiable yet negligible performance penalty. Extensive simulation results executed over networks of increasing size verify, on one hand, that our proposed technique achieves near-optimum spectral channel assignments at a low computational complexity. On the other hand, the obtained results assess that HS vastly outperforms genetically inspired allocation algorithms for the set of simulated scenarios. Finally, the proposed adaptive distributed allocation approach is shown to attain a control traffic bandwidth saving of more than 90 with respect to the naive implementation of a HS-based island allocation procedure.
SN 1568-4946
YR 2012
FD 2012-02
LK https://hdl.handle.net/11556/3614
UL https://hdl.handle.net/11556/3614
LA eng
NO Del Ser , J , Matinmikko , M , Gil-López , S & Mustonen , M 2012 , ' Centralized and distributed spectrum channel assignment in cognitive wireless networks : A Harmony Search approach ' , Applied Soft Computing Journal , vol. 12 , no. 2 , pp. 921-930 . https://doi.org/10.1016/j.asoc.2011.10.001
NO This work was partially funded by the Spanish Ministry of Science and Innovation through the CONSOLIDER-INGENIO 2010 ( CSD200800010 ), the Torres-Quevedo ( PTQ-09-01-00740, PTQ-06-01-0159 ) funding programs, by the Finnish Funding Agency for Technology and Innovation (TEKES) through the COGNAC project, and by the Academy of Finland through the SMAS project (decision number 134624). Javier Del Ser was on leave at VTT Research Center of Finland (Oulu) when this research was conducted. Sergio Gil-Lopez was born in Guadalajara, Spain, in 1978. He obtained his M.Sc. degree in Physics by the University of La Laguna (Spain) in 2001, and his Ph.D. degree in Physics by the University of Granada (Spain) in 2006 under a research grant at the Instituto de Astrofísica de Andalucia (CSIC, Spain). During his Ph.D. track he held visiting positions at IMK and ICFG1 research centers in Karlsruhe and Jüelich (Germany), respectively. Currently he is an associate researcher at the TELECOM Unit of TECNALIA (Spain). His research interests are focused on NP optimization problems tackled by means of heuristic algorithms and local search methods, with a focus on improving the energy efficiency of wireless communication systems. He is coauthor of more than 17 journal articles and 35 conference contributions, has participated in 3 patent applications, and currently co-supervises 2 Ph.D. thesis. He was the co-chair of the PHYLOM 2010 workshop, which was held during the MOBILIGHT 2010 conference.
DS TECNALIA Publications
RD 28 jul 2024